body{
    background:url(../images/back_image.jpg) center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    margin: 0%;
    padding: 0%;
    position: relative;
    color: #ffffff;
    font-family: sans-serif;
}
.header{
    margin-top: 8px;
    width: 100%;
    height: 6%;
    background-color: rgba(0, 60,123,0.8)
}
ul{
    margin: 0%;
}
li{
    margin-top: 8px;
    list-style: none;
    font-size: 20px;
    float: left;
}
.nav:hover{
    color:orange;
    border-bottom: 0px solid white;
    padding-bottom: 8px;
    transition: 0.3s;
}
.nav{
    float: right;
    font-size: 8px;
    margin-top: 25px;
}
.nav_left{
    float: left;
    font-size: 20px;
    margin-left: 4%;
    margin-right: 4%;
    margin-top: 10px;
}

.nav_right{
    float: right;
    font-size: 20px;
    margin-right: 4%;
    margin-top: 10px;
}

.nav_title{
    float: left;
    font-size: 20px;
    margin-right: 30px;
    margin-top: 10px;
}
a{
    text-decoration: none;
    padding: 0px;
    color: white;
    font-size: 20px;
}
a:hover{
    color: orange;
}
